I bought the thermo mug with the Autoseal Bottle for work because I have carried off with an ill-considered move one or the other keyboard. And the cup keeps the heat actually longer than my old cup. For this purpose it is very robust and super easy to clean. In addition, the cup 100% BPA free. On this point, the Americans are ahead of us time. :)
Only the small opening to drink is a little difficult to clean because you have to fumble around with a brush, but this is not a big problem.
All in all a great cup, in the stainless steel version also dishwasher safe (fixed? Whatever).